Low-temperature magnetization study of U/sub 6/X (X = Mn,Fe,Co,Ni) compounds

Journal Article · Sat Jun 01 00:00:00 EDT 1985 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.31.7059· OSTI ID:5565552

DeLong, L E; Guertin, R P; Hasanain, S; Fariss, T

Magnetization and susceptibility measurements have been performed on U/sub 6/Fe and U/sub 6/Co at temperatures 4 K< or =T< or =290 K and applied magnetic fields 10/sup -2/ T< or =H< or =5 T. Low-temperature magnetization measurements at H = 10/sup -2/ T were also made on U/sub 6/Mn, U/sub 6/Ni, and U/sub 6/Mn/sub 0.5/Co/sub 0.5/. All of these materials have strongly paramagnetic, weakly-temperature-dependent susceptibilities at T< or =290 K. Low-field magnetization and metallography results provide information concerning the nature of small concentrations of ferromagnetic impurity phases found in all of the samples studied. An analysis of the data with use of paramagnon models implies that all of the U/sub 6/X compounds are strongly-exchange-enhanced paramagnets. Recent Fermi-liquid models are discussed in relation to predictions of p-wave superconductivity, exchange-enhanced paramagnetism, and electron localization in heavy-fermion systems. An empirical correlation is examined between the ratio of the total magnetic susceptibility to the electronic specific heat and the occurrence of either superconductivity or ferromagnetism for a broad class of metallic solids. The correlation suggests that the U/sub 6/X compounds are near the boundary between superconducting and ferromagnetic ground states.

• Research Organization: Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506
• OSTI ID: 5565552
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 31:11
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
URANIUM ALLOYS
MAGNETIZATION
MANGANESE ALLOYS
IRON ALLOYS
NICKEL ALLOYS
BINARY ALLOY SYSTEMS
ELECTRONIC SPECIFIC HEAT
EXCHANGE INTERACTIONS
INTERMETALLIC COMPOUNDS
MAGNETIC SUSCEPTIBILITY
PARAMAGNETISM
SUPERCONDUCTIVITY
VERY LOW TEMPERATURE
ACTINIDE ALLOYS
ALLOY SYSTEMS
ALLOYS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
INTERACTIONS
MAGNETIC PROPERTIES
MAGNETISM
PHYSICAL PROPERTIES
SPECIFIC HEAT
THERMODYNAMIC PROPERTIES
360104* - Metals &amp; Alloys- Physical Properties
656102 - Solid State Physics- Superconductivity- Acoustic
Electronic
Magnetic
Optical
&amp; Thermal Phenomena- (-1987)